My son had a pilonidal cyst 3 months ago. He had it drained and left open to heal. He went to the doctors to have it packed and cleaned for 10 days, then we were told it needed to be left uncovered to heal. It’s now 3 months on and it’s still red and sore, he has been applying antiseptic cream, but it doesn’t seem to be closing and healing. Is this normal? Has anyone else had this experience? Any advice would be helpful. Many thanks.